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Apoptosis: Difference between revisions
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Apoptosis, programmed [[cell]] death, is a hot issue to biologists and scientists. It occurs in multicellular organisms with active process. Apoptosis occurs by cell shrinkage, protein fragmentation, chromatin condensation, [[DNA]] degradation and collapse of cell. [http://www.nature.com/nature/insights/6805.html] | Apoptosis, programmed [[cell]] death, is a hot issue to biologists and scientists. It occurs in multicellular organisms with active process. Apoptosis occurs by cell shrinkage, protein fragmentation, chromatin condensation, [[DNA]] degradation and collapse of cell. [http://www.nature.com/nature/insights/6805.html] | ||
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*The cells may no longer be needed. When a baby is in his mother’s womb, his fingers or toes are connected to each other by connective tissue. While he is growing up, the connective tissue disappears through cell death (apoptosis). If the connective tissue does were not killed by apoptosis, the baby’s fingers would remain attached as with a duck’s feet. | *The cells may no longer be needed. When a baby is in his mother’s womb, his fingers or toes are connected to each other by connective tissue. While he is growing up, the connective tissue disappears through cell death (apoptosis). If the connective tissue does were not killed by apoptosis, the baby’s fingers would remain attached as with a duck’s feet. | ||
*Apoptosis may be a mechanism for preventing cancer. When the cells live longer, they have a genetic problem or damage. Finally the damage leads the cells to become the cancer. Without apoptosis, there is the possibility that originally normal cells become cancer. ( | *Apoptosis may be a mechanism for preventing cancer. When the cells live longer, they have a genetic problem or damage. Finally the damage leads the cells to become the cancer. Without apoptosis, there is the possibility that originally normal cells become cancer. (The Science of Biology. p208) | ||
Research in the area of cell death indicates that apoptosis is a very important process in our body. | Research in the area of cell death indicates that apoptosis is a very important process in our body. | ||
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Even though apoptosis is programmed cell death, it plays an important role in the life of an organism. Apoptosis helps to form the overall body shape and the shape of organs. In the immune system, apoptosis plays an important role that eliminates aggressive immune cells. [http://www.nature.com/nature/insights/6805.html] | Even though apoptosis is programmed cell death, it plays an important role in the life of an organism. Apoptosis helps to form the overall body shape and the shape of organs. In the immune system, apoptosis plays an important role that eliminates aggressive immune cells. [http://www.nature.com/nature/insights/6805.html] | ||
Apoptosis plays an important role in immune system. Every person has white blood cells and red blood cells. If a person has more number of white blood cells than number of red blood cells, he will have a caner. If apoptosis plays its own role (programmed cell death), he will not have the cancer (follicular large-cell lymphoma). Unfortunately the white cells do not die, but they keep dividing. By dividing white blood cells, mutation occurs. A person will eventually die from over population of white blood cells. ( | Apoptosis plays an important role in immune system. Every person has white blood cells and red blood cells. If a person has more number of white blood cells than number of red blood cells, he will have a caner. If apoptosis plays its own role (programmed cell death), he will not have the cancer (follicular large-cell lymphoma). Unfortunately the white cells do not die, but they keep dividing. By dividing white blood cells, mutation occurs. A person will eventually die from over population of white blood cells. (The Science of Biology. p401) | ||
==Cell damage or Infection== | ==Cell damage or Infection== | ||
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== Related References == | |||
* [http://www.celldeath.de/encyclo/aporev/aporev.htm Introduction to Apoptosis] Celldeath | * [http://www.celldeath.de/encyclo/aporev/aporev.htm Introduction to Apoptosis] Celldeath | ||
* [http://www.apoptosisworld.com/ Apoptosis] World Apoptosis World | * [http://www.apoptosisworld.com/ Apoptosis] World Apoptosis World | ||
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* [http://www.nature.com/nature/insights/6805.html Apoptosis] Nature.com | * [http://www.nature.com/nature/insights/6805.html Apoptosis] Nature.com | ||
* [http://www.esi-topics.com/apoptosis/ Apoptosis] Essential Science Indicators Special Topics | * [http://www.esi-topics.com/apoptosis/ Apoptosis] Essential Science Indicators Special Topics | ||
* | * Purves, Sadava, Orians, and Heller. The Science of Biology. Virginia: Gordonsville, 2004 | ||
== See Also: == | |||
[[Category:Cell biology]] | [[Category:Cell biology]] | ||
